The British tourists who reportedly has a grenade thrown at them in Kenya were travelling in a van from Diani in Kwale to Mombasa when it was targeted as it slowed down, police told the Kenya-based Standard Digital.
"He vanished soon after he hurled the explosive," police chief Robert Kitur told the paper.
The grenade failed to explode and is being examined by police.
The attack comes on the same day Kenya celebrates 50 years of independence from British colonialist rule.
More top news
As shoppers gear up for one of the biggest challenges in the bargain hunter's calender, Ashleigh Swan shares her top Black Friday tips.
A Manchester couple who funded their lavish globetrotting lifestyle by defrauding the NHS of up to £1 million have been jailed.
Disappointing grey skies, with a lot of cloud cover for most of the UK, but it will remain mainly mild for the time of year.